Column Name: PRIMACY_AGENCY_CODE
Description: Two character postal code for the state or territory having regulatory oversight for the water system. If the water system is regulated directly by EPA, this code will consist of the two-digit EPA Region number (0110). The Navajo Nation has primacy over its water systems, so NN is used in this case.
Envirofacts Table Name(s):
- Type: VARCHAR2
- Length: 2